US1879868A

US1879868A - Bending tool

Info

Publication number: US1879868A
Application number: US399220A
Authority: US
Inventors: Breer Carl
Original assignee: Individual
Current assignee: Individual
Priority date: 1929-10-12
Filing date: 1929-10-12
Publication date: 1932-09-27
Anticipated expiration: 1949-09-27

Description

Sept. 27, 1932. c. BREER 1,879,868

BENDINQ TOOL Filed Oct. 12, 1929 II I! II I II llllllllllllll INIIHIIIIIIIIHIIIIII mag-5555mm v INVENTOR C'AHL SHEER.

Patented Sept. 27, 1932.

Y UNITED STATES PAT-Eur our. BREER, or nn'rnorr, vrromeeiv Bmvnme TOOL Application: filed ctober12, 1929. Seria1'No..399,220.

This invention relatesto a tool or accessory of the connection shown in my co-pending application Serial #454,485, filed May 21,

1930 which will enabledealers to bend a has brought about this requirement, the main essential being that the user be able to locate the valve stem in a position accessible for inflation purposes from the outside of the wheel. To avoid the necessity of supplying the dealer with two complete sets, of inner tubes and tying up capital without increase of return, the present invention provides a tool for readily bending straight valve stems that have been secured to the inner tube previously, usually at the factory, from the straight form to an angular form, as occasion may require. It aims to provide a practical, efiicient and inexpensive tool for such bending of valve stems without requiring their removal from the inner tubes; one that may be operated manually, at least by'preference, and is accurate and reliable in service.

An embodiment of the inventionis, illustrated in the accompanying drawing, in

which: Fig. 1 is a plan view of the tool, showing in solid lines the position of the arms with a straight valvestem ready to be bent, and in dotted lines the position ofthe parts'after the valve stem has been bent, the inner tube being omitted for the sake of clearness;

' Fig. 2 isa' cross section through "the tool on the line 2'2, Fig. 1; Fig. 3 is a plan view of a modification; Fig. 1 is a plan view of a usual form of straight valve stem, showingone of its two slabbed faces.

, As shown in the drawing, the. tool comon the arm 1.

prises a

pair trams

1 and 2, .whiclrfare pivoted or fulcrumed, asindicated at 8, the

remote ends of the arms being free for.

manual manipulation. Onthe arm 1, in one direction; from the pivot or fulcrum pin 3,

is located a lug or pin a, projecting laterally. therefrom. .A similar, upstanding lug or pin 51s fixed. to the arm 2,in a direction opposite from thefulcrum 3. That is to say, the pivot or. fulcrum pin 3 is nearerthe free ends of the arms 1 and2 than the lug 4, but farther than the second lug 5 These lugs are preferably, but not necessarily, rounded, as shown,

and may befiXed to thearms in any suitable manner. Of course, if desired, the'lugsi and 5 may be 1n the to'rmof rolls. On the arm 1," adjacentthe pivot 3, is located a lug or arbor 6,.preferably having a curved face 7 approximating the bend that is to be made in thevalve stem. This arbor lug may befixed in any suitable manner to the arm 1. p j Means are preferably provided to limit or stop the approach ofthe arms land 2. Any

drawing, in Figs. 1 and 3, respectively, two

forms of a stop are disclosed.

Referring' for the present to Fig. 1, the

arm lis shown provided with a projection .or offset 8, and the arm 2 with a plate 9, pro

vided with slots 10 and 11, the former of which embracesthe lug .5, and the latter of which encloses the shank of a bolt 12, between the head 13 of which bolt and a washer 14i, is confined a springflS under tension and 7 thereby frictionally holding the plate 9 in any usted position]. 'When the plate!) has been shifted as far in one. direction as the slots 10 and 11 permit, one of the abutment faces 16 is presented for cooperation with the offset 8, and when the plated) is moved to the suitable devices may be employed. In the opposite eXtr-emefihefother ofthe faces 16 is presented forcooperation with the portion 8 r In Fig. 3. of the drawing, another and simpler construction or stop illustrated.- 9

'me'ntbetween the flat side face 26 As seen by a scrutiny of this figure of the drawing, it comprises a plate 20, fulcrumed about the axis of the screw 21, between the head of which screw and the plate 20 is interposed a spring or friction washer 22. The plate 20 may be moved in either direction about its fulcrum pin 21 soas to locate its nose 23 in either of the positions indicated in Fig. 3 and in the path of the other arm, such location being determined by the position of the pins 24 and 25, flanking the plate 20. In this. modified form of construction, as in the other, the tool is adapted to bend either of the two sizes or types of valve stems that are in general use at the present time.

Obviously, the principle of 'the'sestop'slimiting movement of the

arms

1 and 2 toward each other might be extended to permit of stopping the movements ofthe arms in any number of desired positionsrelative one to another; N I

The inanner of using the device-is obvious from the drawing. 7 V

H The tool of the present invention is intended for bending valve stems which have been previously reduced intermediately by 'machining oil the central portionxof their I threads, as indicated in the drawing, or are provided with threads only in the irmnediate' vicinity of the junction of the valve stem'with' the inner tube. Usually, the valve stems are lengthwise slabbed off to form a pair of oppositely disposed flat faces 26.

between the lugs 4: and 6 and positioned so that the peripheral face of the lug 4 engages the flat face 26 of the threaded shank of the valve stem and the planular side 6' of the lug 6'" engages the inclined shoulder 5' of the valve stem. The rounded extremity of I valve as shown in Fig. 1; 'As'the 'arms'l and 2 are brought together, the lug 5 bends the reduced intermediate portion of the valve stemaroun'd therounded extremity 7 of the lug'26. During this bending operation the planular face'6' of the lug6 secures the valve stem against axial movement and'the engageand the lug lprevents the valve stem from rotating. With the above construction, the threads of the valve stem are protected during the bendin'g'operation and the outer part'of the valve stem is bent in a predetermined direction with respect tothe flat side faces on "the respectively opposite sides "of the valve stem.

It will be understood that the invention is capable of applicationin wide'varietyof form's other than those disclosedin the drawing and that it is not intended'to be limited 'one' 'side' so as to bend In operation, the valve stem is inserted to details hereinbefore described and illustrated. Reference should therefore be made to the accompanying claims for an understanding of the scope of the invention.

Having thus described my invention, What I claim and desire to protect by Letters Patent is:

1. In a tool for bending threaded valve stems which have a longitudinal fiat side face and a peripheral shoulder, a pair of pivotally connected arms, a pair of lugs on one of said arm's,one having a flat side for engaging said shoulder at a' point opposite'fro'm said fiat face and a rounded extremity for engaging the intermediate portion of said valve stem, the other'lu'g having a side arranged for re ceiving said flat face, and means on the other arm for engaging said valve stem only on one side soasto bend the latter upon said rounded extremity.

l 2. In a toolfor bendiiig fthrea ded valve stems which have a longitudinal fiat face and a peripheral shoulder inclined with respectto said flat face, 'a pair 0f pivotally connected arms, a pair "of lugs on "one of said arms,'one lug having "an. edge for receiving: said fiat face, the other'lug having a flat 'side' inclined with respect to said'edge and having'a rounded extremity forgengaging the intermediate portion olfsai d valve stem, and means on the other arm for engaging said 'valve stem on the latteruponis'aid rounded extremity, 7

3 In a tool" for bending threaded valve 'stems'which have a longitudinal flat side face I and a peripheral shoulder, a pairof pivotalyconn'ect'ed' arms,fa pa r of lugs on oneof said arms, one lughinting a flat side for en'- gaging saidshoulder at a'p'oint opposite from engaging the intermediate portion of said "valve stem, the"other"lug havi'nga sidearranged for rec'eivingsaid flatfac'e, and means stem-s0 asto bendfthe 'ed extremity. e

' i. The method of bending a 'tire valve stem having a threadedshan'k" portion provided wlth longitudinal,"opposite flat facesfa relatter upon said roundducedportionand a shoulder at the junction of said portions, saidmethod comprising d-isp sing Said shank portion between a pair of aws, engaging the shoulder on the valve stem to secure it against axial movement in said fl'at "face and a rounded extremityfor one direction, engaging the valve stem at a location spaced from the shank portion and applying forceto the valve stem atsaidlocation to bend thevalve stem around the shoulder-engaging point as afulcr'umng' I 5. The method'ofbendingatire valve ste havinga threaded shank portion previded with longitudinal,"opposite fiat races a reducedportion and a tapered shoulder between said portions, said method compri s'ingengaging said shank portion at its fiat sides to prevent rotational movement of the valve stem about its axis, engaging the tapered shoulder on the valve stem to secure the valve I stem against axial movement in one direction, engaging the valve stem at a location spaced from the shank portion beyond the tapered shoulder and'applying force to the valve stem at said location to bend it around the shoulder-engaging point as a fulcrum.

CARLBREER.